In this work, Y2O3-stabilized ZrO2 (YSZ) foams with low relative density were developed through the replication method, for application as porous radiant burners. The ceramic foams were produced by impregnation of open-cell polyurethane foams with aqueous suspensions and different fractions of raw materials: ZrO2-8% Y2O3 (8YSZ) powder, and additives. The materials were milled for 10-40 min. The impregnated foams were dried and submitted to a heat treatment for polyurethane elimination at 1000 A degrees C for 1 h, with subsequent sintering of the remaining ceramic structure at 1600 A degrees C for 2 h, which resulted in YSZ foams with low relative density (0.07). The structural analysis revealed a cellular structure with an average mechanical strength of 95.6 kPa. The radiation efficiency (> 19%) was obtained by tests with different air/fuel ratio. The ceramic matrixes exhibited high performance and structural integrity at high operation temperatures (1400 A degrees C).